 Benjamin W. Lahti, 24, Ironwood, Mich., arrested March 12 in Minocqua, charged with use of a computer to facilitate a child sex crime, exposing a child to harmful materials and possession of drug paraphernalia;

 Marc S. Marion, 54, Madison, arrested March 13 in Madison, charged with use of a computer to facilitate a child sex crime;

 Jeremy W. Stegall, 29, Fitchburg, arrested March 13 in Madison, charged with use of a computer to facilitate a child sex crime;